Knorr spent the past six seasons at Wake Forest, including the last three as the Demon Deacons’ defensive coordinator.

“Brian is a strong addition to our coaching staff,” Wilson said in a statement. “He brings tremendous experience and a background having coached on both sides of the ball, as a defensive coordinator and as an FBS head coach. We are excited to take a positive step in building a winning program that our players and fans deserver.”

It’s been an odd past two weeks for Knorr. With the change in head coaches at Wake Forest, Knorr accepted a position on Air Force’s staff on Jan. 10 — he graduated from Air Force in 1986 and played quarterback as well as having two coaching stints there.

But the opportunity at Indiana was one he couldn’t pass up.

"There is a buzz about the direction IU Football is headed in and I look forward to bringing some of the toughness and aggressiveness that I know Coach Wilson wants to implement on the defensive side of the ball," said Knorr, who was head coach at Ohio from 2001-04.

He’ll have his hands full at Indiana. The Hoosiers were 120th (out of 123) in total defense in 2013, allowing 527.9 yards per game. They were 115th against the run (237.8 yards per game) and 114th in scoring defense (38.8 points).

At Wake Forest last season, the Deacons were 32nd in yards allowed (366.2) and 38th in scoring defense (24.1).